After the complete disappearance of the ideal of the Tetrarchy as a result of Constantine's triumph in 324 AD, it seemed that only his descendants would be the ones to rule the empire. Among all the usurpers, it was Magnentius and his brother Decentius, those who introduce in their numismatics the most interesting symbols on behalf of legitimacy ever represented by a social climber all along the IV century AD. In the duel between Constantius the Second and Magnentius, each one assumed legitimacy accusing the other one of being a tyrant. The image of the Christogram alone at the back of the coins and the repetitive iconography of Victory are the centre of the numismatic publicity Magnentius carried out against Constantius.